Ships at 12.9 KB.

Read and write styled .xlsx in the browser and Node.js. The excel-bridge writer adds 12.9 KB to your bundle, where SheetJS adds 95.8 KB and ExcelJS 272.1 KB.

min+gzip · esbuild 0.28.2 · measured 2026-10-08 · method

npm yarn pnpm bun

Install npm i excel-bridge

Pack a workbook Read the docs

Bundlephobia MIT license

excel-bridge Via npm

Only what you importtree-shaken

Fromthe npm registry

Toyour front-end bundle

ContentsExcelWriter · styled .xlsx export

Pieces1 import

Weight · min+gzip 12.9KB

Same job, other carriers

Bundle weight to write an .xlsx, min+gzip
excel-bridge	12.9 KB
SheetJS	95.8 KB
ExcelJS	272.1 KB

Version1.6.0

LicenseMIT

Deps2

Pack a workbook

Edit any cell, then print the label. The page builds a real .xlsx with the live library and hands you the file: open it in your spreadsheet app to check the styling, formulas, color scale, filter dropdowns and link.

Outboundstep 1 of 2

sales-report.xlsx · Sales Live

Label printer

4×6 thermal · prints one label per file you pack

excel-bridgePacked live

Filenot packed yet

Printed--:--

Weight on disk --.-KB

Edit the sheet, then print. The label carries the real file's name, weight and contents.

Receive a parcel

Drop any .xlsx on the dock and excel-bridge unpacks it in your browser: values, cell types, formulas, styles, filters and links. Nothing is uploaded to a server.

Drop an .xlsx on the dock

or browse your files · step 2 of 2

Print a label above first, then read the same file straight back, all client-side.

Unpacked cells will appear here.

Pay only for what you import

Bundlers keep the exports you import and drop the rest. Each entry point is weighed on its own.

Itemized manifestmin+gzip · esbuild 0.28.2

Import	Weight	Relative weight
`createExcelWorkbookStream`	12.3 KB
`ExcelWriter`	12.9 KB
`ExcelReader`	28.7 KB
`Workbook`reader + writer	41.0 KB
`ExcelBridge`convenience object	41.1 KB
Everything	43.7 KB
SheetJS `utils` + `write`xlsx 0.18.5 on npm	95.8 KB
ExcelJS 4.4.0default browser build	272.1 KB

Measured 2026-10-08 on excel-bridge 1.6.0: each row bundles a one-line export { … } entry with esbuild 0.28.2 (--bundle --minify --platform=browser --format=esm) and gzips it with Node's zlib; 1 KB = 1,000 bytes. Reproduce with pnpm run size.

Declaration of contentsMIT · no commercial value

What the package contains
No.	Description of contents	Qty	Net weight
1	Read & writeStyling, fonts, per-side borders, formulas, dates, merged cells, freeze panes, row heights, conditional formatting, data validation, autofilters and hyperlinks, parsed back by the reader.	12	12.9 KB write 28.7 KB read
2	Runtime dependencies`fflate` and `fast-xml-parser`. No ExcelJS or SheetJS inside.	2	—
3	Runtimes`File`/`Blob` in the browser, `Uint8Array` in Node.js, one API.	2	—
4	Streaming writerMillion-row exports from a sync or async iterable, never held whole in memory.	1M rows	12.3 KB
5	`Workbook` APILoad a workbook this library wrote, edit cells, styles, merges, freeze panes, filters and links, then save it back. Content it does not model is dropped.	1 class	41.0 KB
6	TypeScript typesIntelliSense for every export, in both ESM and CJS builds.	all exports	0 KB at runtime
7	Signed releasesEvery version is published to npm with build provenance.	every release	—

Net weight is the min+gzip cost of the matching import from the itemized manifest; types are erased at build time.

How it compares

The same common case, styled multi-sheet reports read and written from typed data, while staying small enough for a front-end bundle.

Rate sheet3 carriers · same job

Capability	excel-bridge	ExcelJS	SheetJS (community)

¹ Min+gzip of what a browser bundle needs to write an .xlsx: ExcelWriter, ExcelJS's default browser build (not tree-shakeable), and SheetJS utils + write from npm xlsx@0.18.5. Bundled with esbuild 0.28.2 and gzipped on 2026-10-08; reproduce with pnpm run size. Reading adds the XML parser: ExcelReader is 28.7 KB and the whole library 43.7 KB. Bundlephobia measures whole packages with its own toolchain: excel-bridge · exceljs · xlsx.

Transit times

Library	Write time	Output	vs excel-bridge
excel-bridge	560 ms	2.41 MiB	1×
exceljs	1490 ms	2.82 MiB	2.7×
xlsx / SheetJS	510 ms	18.23 MiB	0.9×

Writing 50,000 rows × 10 columns, median of 5 runs (Node 24.19, Apple M4). Numbers vary by machine; reproduce them with pnpm run bench. SheetJS is fast to write but its default output is far larger.

Packing instructions

Typed from the first import. These are the calls behind the demo above.